If A and B are two sets with `n(A)=4` and `n(B)=2` then the number of onto functions from A to B is

If A and B are finite sets such that n(A)=5 and n(B)=7,then find the number of functions from A to B.

If A, B are two sets such that n(A) = 15, n(B) = 20, then the number of injections from A into B is

If A , B are two sets such that n(A)=100, n(B)=150 , then the number of bijections from A onto B is

If A={0,1,2,3,4} and B={a,b} , then the number of onto functions from A to B is

If n(A)=3 and n(B)=4 , then no. of of one-one function from A to B is :

If A, B are two sets such that n(A) = 100, n(B) = 150, then the number of bijections from A onto B is

If A and B are two sets such that n(A)=5 and n(B) = 6, then the number of one-one and onto mapping from A to B is

If A and B are two sets, then n(A)+ n(B) is equal to

Let A and B be any two sets such that n(B)=P, n(A)=q then the total number of functions f: A -> B is equal to